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Fixed potential race condition. 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@149611 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Doug Cutting 2001-10-11 22:44:23 +00:00
parent 6369c5a884
commit 2a5c45947d
1 changed files with 2 additions and 2 deletions
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4
src/java/org/apache/lucene/index/SegmentsReader.java
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@ -77,7 +77,7 @@ final class SegmentsReader extends IndexReader {
starts[readers.length] = maxDoc;
}
public final int numDocs() {
public synchronized final int numDocs() {
if (numDocs == -1) { // check cache
int n = 0; // cache miss--recompute
for (int i = 0; i < readers.length; i++)
@ -101,7 +101,7 @@ final class SegmentsReader extends IndexReader {
return readers[i].isDeleted(n - starts[i]); // dispatch to segment reader
}
public final void delete(int n) throws IOException {
public synchronized final void delete(int n) throws IOException {
numDocs = -1; // invalidate cache
int i = readerIndex(n); // find segment num
readers[i].delete(n - starts[i]); // dispatch to segment reader